# US 10,767,022 B2 · Fiber wound body, fiber-reinforced resin material, and method for manufacturing fiber wound body

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- Number: US 10,767,022 B2
- Document ID: US10767022B2
- Status: Granted
- Kind: B2
- Application number: 16/316,229
- Filed: 2017-06-21
- Published: 2019-10-03
- Granted: 2020-09-08
- Earliest claimed: 2016-07-15
- Assignees: Kabushiki Kaisha Toyota Jidoshokki
- Applicants: Kabushiki Kaisha Toyota Jidoshokki
- Inventors: Ryohei Tsuji; Genki Yoshikawa; Shun Kuno; Ryuta Kamiya
- Web page: https://patentgrep.com/patent/US10767022B2

## CPC

- C08J 5/24: Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
- B29C 70/24: oriented in at least three directions forming a three-dimensional [3D] structure
- B29C 70/32: on a rotating mould, former or core
- D04C 1/06: Braid or lace serving particular purposes
- D10B 2401/06: Load-responsive characteristics
- D10B 2403/02411: with a single array of unbent yarn, e.g. unidirectional reinforcement fabrics
- D10B 2505/02: Reinforcing materials; Prepregs
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- D04C: BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE (machines for making soles from strips of material A43D29/00; cane working B27J1/00)
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES

## Abstract

This fiber wound body has a plurality of reinforcing fiber yarns wound around a winding axis, each of the reinforcing fiber yarns having a thickness gradient portion in which the fiber content is uniform along the longitudinal direction of the yarn and the thickness gradually changes.

## Claims

### Claim 1

A fiber wound body comprising:
reinforced fiber yarns wound about a winding axis, wherein
each of the reinforced fiber yarns includes a gradual cross-section change portion, and
the gradual cross-section change portion has a fiber content rate that is constant in a longitudinal direction of the yarn and has a cross section that gradually changes.

### Claim 2 (depends on 1)

The fiber wound body according to claim 1, further comprising a gradual thickness change portion having a thickness that gradually changes along the winding axis, wherein
the thickness is a dimension of the fiber wound body in a radial direction,
the gradual thickness change portion has a thick part and a thin part, and
the cross section of the gradual cross-section change portion regularly decreases from the thick part toward the thin part of the gradual thickness change portion.

### Claim 3 (depends on 1)

The fiber wound body according to claim 1, wherein
the reinforced fiber yarns include first reinforced fiber yarns, second reinforced fiber yarns, and third reinforced fiber yarns,
the fiber wound body includes a braid,
the first reinforced fiber yarns are arranged parallel to each other,
the second reinforced fiber yarns are arranged parallel to each other and intersect with the first reinforced fiber yarns,
the third reinforced fiber yarns are arranged parallel to each other and intersect with the first and second reinforced fiber yarns, and
an angle at which the third reinforced fiber yarns intersect with the first reinforced fiber yarns is equal to an angle at which the third reinforced fiber yarns intersect with the second reinforced fiber yarns.

### Claim 4 (depends on 1)

A fiber-reinforced resin material, comprising:
the fiber wound body according to claim 1, the fiber wound body being a fiber-reinforced base; and
a matrix resin.

### Claim 5

A method for manufacturing a fiber wound body, the method comprising:
elongating each of reinforced fiber yarns having a cross section constant in a longitudinal direction of the yarn in one direction with a drafting device including roller groups;
when elongating the reinforced fiber yarns in one direction, forming a gradual cross-section change portion having a fiber content rate that is constant in the longitudinal direction of the yarn and having a cross section that gradually changes by continuously varying a drafting rate of the drafting device to continuously change the cross section of the reinforced fiber yarns in the one direction; and
obtaining a fiber wound body by winding the reinforced fiber yarns including the gradual cross-section change portions about a winding axis.